Originally Posted by
SLF3
So it’s happened three times, the NTSB say it’s dangerous, the fix is obvious but only applied for US carriers. Which non US regulator will move first?
This is actually quite normal. NTSB has no rule making authority - they can only make recommendations - it's the FAA that must take actual action. Further, if the FAA issues an AD or other action, it only applies to US operators - they have no authority over non-US operators (although they can ban specific non-US operators from US airspace if they believe the operator is unsafe). What normally happens is - after the FAA has issued an AD or other action - the other affected airworthiness authorities will take duplicate (or at least similar) action.
Same thing with EASA - they only have authority over the operators in EASA countries.